US3722837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carburetor utilizing surface tension and capillary action
Assignee: Individual
•
Filing: 1972-04-12
•
Granted: 1973-03-27
•
Expires: 1992-04-12
Abstract
Abstract Wet plates or grids with minute perforations are so positioned as to utilize the fuel property of surface tension and capillary action to allow the fuel to form a film over the apertures so that the air pressure differential between the manifold side of the grid and the atmospheric pressure side will stretch the fuel film and encapsulate sufficient air to burn the fuel in the film.
Inventors
- 👤 W Dapprich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:29
CPC Classifications
F; F02; F02M; F02M17/00; F02M17/18; F02M17/26; F02M17/28; Y; Y10; Y10S; Y10S261/00; Y10S261/06
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
154 words
A carburetor comprising, in combination, a casing having an air inlet which is exposed to the atmosphere and an air outlet which communicates with the inlet manifold of an internal combustion engine; a substantially vertically extending double-grid carried by said casing and disposed between the air inlet and the air outlet; said double-grid including a pair of closely adjacent parallel walls with unoccupied space therebetween and having a large number of minute apertures therein which are exposed to the air inlet of said casing; the majority of the minute apertures in each of said doublegrids being sufficiently small as to permit capillary action to form a film thereover which will burst into minute bubbles which encapsulate successive charges of air passing said double-grids; means for supplying measured amounts of hydrocarbon fuel to the lower portion of said double-grid; and means for supplying measured amounts of hydrocarbon fuel to the upper portion of said double-grid.
Claim 2
Dependent Claim
154 words
A carburetor comprising, in combination, a casing having an air inlet which is exposed to the atmosphere and an air outlet which communicates with the inlet manifold of an internal combustion engine; a substantially vertically extending double-grid carried by said casing and disposed between the air inlet and the air outlet; said double-grid including a pair of closely adjacent parallel walls with unoccupied space therebetween and having a large number of minute apertures therein which are exposed to the air inlet of said casing; the majority of the minute apertures in each of said doublegrids being sufficiently small as to permit capillary action to form a film thereover which will burst into minute bubbles which encapsulate successive charges of air passing said double-grids; means for supplying measured amounts of hydrocarbon fuel to the lower portion of said double-grid; and means for supplying measured amounts of hydrocarbon fuel to the upper portion of said double-grid.
Claim 3
Dependent Claim
25 words
The combination of claim 1 wherein the sheet-like walls of said double grid are closer together at their upper edges than at their lower edges.
Claim 4
Dependent Claim
14 words
The combination of claim 1 wherein the double grid is continuous and generally annular.
Claim 5
Dependent Claim
16 words
The combination of claim 1 wherein the double grid is continuous and generally annular but serpentine.
Claim 6
Dependent Claim
31 words
The combination of claim 1 wherein the first-named means comprises a generally annular trough and the second-named means comprises a generally annular cap which is in substantial parallelism with said trough.
Claim 7
Dependent Claim
29 words
The combination of claim 1 wherein the first-named means comprises a float chamber, float valve means in said float chamber, and means connecting said float chamber with said trough.
Claim 8
Dependent Claim
18 words
The combination of claim 1 wherein the last-named means comprises a charging valve connected with the fuel inlet.
Claim 9
Dependent Claim
36 words
The combination of claim 1, together with a centrally disposed back-fire prevention valve, and wherein the first-named means comprises a float chamber which surrounds the back-fire prevention valve and wherein the double-grid surrounds the float chamber.
Claim 10
Dependent Claim
48 words
The combination of claim 1, together with a centrally disposed back-fire prevention valve, wherein the first-named means comprises a float chamber which surrounds the back-fire prevention valve, wherein the double-grid surrounds the float chamber; and wherein the last-named means comprises a charging valve connected wIth the fuel inlet.
Claim 11
Dependent Claim
23 words
The combination of claim 1 wherein the apertures of the double grids are between approximately 0.016 inch and approximately 0.0625 inch in diameter.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |